Idaho by Cathleen Cole delves into the multilayered facets of memory, guilt, and the rugged landscape of human emotions, set against the expansive backdrop of the Idaho wilderness. The novel is an intense exploration of family, tragedy, and the inherent unpredictability of life. It crafts a compelling narrative that captures the quiet drama of the everyday, interweaving the past and present with a subtle yet powerful command of language and atmosphere.

The novel opens with Ann and Wade Mitchell, a couple living a seemingly serene life on a remote mountain in Idaho. However, as the storyline delicately unfolds, Cole reveals the deep scars that lie beneath this tranquil surface. The Mitchells’ life is overshadowed by a shocking act of violence that fractures their marriage and their understanding of reality. The incident, involving the sudden and tragic death of their youngest daughter, May, and the subsequent imprisonment of their older daughter, June, forms the central mystery of the story. Cole masterfully uses this event not just as a plot device but as a catalyst for delving into the complex emotional landscapes of her characters.

What is remarkable about Idaho is Cole's use of environment as a character in its own right. The Idaho setting is vividly portrayed, with descriptions of the rugged landscape mirroring the tumultuous inner worlds of the characters. Cole’s prose is evocative and rich, filled with sensory details that bring the natural world to life— from the scent of pine in the air to the harsh, biting winds of winter. This intertwining of setting and mood serves not only to anchor the reader in the novel’s specific milieu but also amplifies the themes of isolation and unpredictability central to the story.

The narrative structure of the book is non-linear, a choice that enhances the theme of memory’s unreliability. Cole shifts between various perspectives and timelines, painting a comprehensive portrait of the Mitchell family before and after the tragedy. This fragmented style reflects the fragmented lives of the characters, especially Ann, who struggles with her memory and a slowly encroaching dementia. Her deteriorating memory adds a poignant layer to the narrative, challenging the reader’s understanding of truth and the reliability of one’s own mind.

Aside from the main storyline, Cole introduces Jenny, a young artist who becomes entangled with the Mitchells. Jenny’s perspective provides a contrast to the family’s isolated world, offering an outsider’s view into the complex dynamics at play. Her interactions with Wade and her gradual uncovering of the family’s past adds depth to the narrative, presenting themes of redemption and the possibility of starting over despite one’s circumstances. Jenny’s character acts as a subtle catalyst for healing, bringing to light the different ways individuals cope with grief and guilt.

Character development is a strong suit of Cole. Each character is meticulously crafted with deep internal worlds and flaws that make them profoundly human. The slow reveal of each character’s motives and their pasts serve as a testament to Cole’s skill in character exploration. Wade, in his silent endurance; Ann, in her fragmented recollections; and even June, who remains largely enigmatic but drives the story's central conflict, are all testament to the novel's deep psychological insights.

The thematic core of Idaho revolves around the unpredictability of life and the impact of past actions on the present. It probes how life can change irrevocably in a moment’s notice and explores the ripple effects of such changes. Cole does not offer easy answers but instead presents life’s complexities in their full, often painful clarity. This narrative choice not only enhances the novel’s realism but also elevates it to a poignant study of human resilience and vulnerability.

However, the very strength of the book—its complex narrative structure and deep psychological insight—may also be a point of contention for some readers. The pace is deliberate, often introspective, which might not cater to those looking for a more straightforward or fast-paced thriller. Moreover, the resolution of the narrative threads might leave some readers desiring more concrete closures. Yet, for those who appreciate nuanced storytelling and character-driven narratives, Idaho is a deeply rewarding experience.

In conclusion, Idaho by Cathleen Cole is a beautifully written, thought-provoking novel that tackles profound themes through the lens of an intimate family tragedy. It is both a meditation on the forces of nature—both human and environmental—and a meticulous study of the fragility of life and memory. With its rich descriptiveness, complex character portrayal, and thematic depth, Idaho is a compelling read destined to resonate with readers long after they turn the last page.